Kearing Parallel Rolling Ruler

30cm & 12” multi-purpose measuring rolling ruler.
An excellent tool for making parallel lines, hatching, circles, etc.
Each centimeter has a circle hole for drawing circles and ellipses, including mini protractor at center.
This measuring rolling ruler is a good helper for artist, student, pattern maker or designers’ work or study.
Made of transparent plastic, light-weighted and easy to carry.
Transparent material allows you to draw without ignoring some important figures or words.